Paper-cutter.



N0. 640,7I3. I

SPROULE. Patented Jan. 2, I900 PAPER CUTTER.

( pplication filed Au 7 1 3 Sheets'8heet (N0 Modal.)

n42 "cams PETERS cu, vHoTo-umov, WASHINGTON, D c.

Patented Jan. 2, I900.

B. F. SPROULE.

PAPER CUTTER.

(Application filed Aug. 7, 1899.)

3 Sheets-Sheet 2.

(No Model.)

No. 640,713. Patented Ian. 2, I900.

R. F. SPROULE.

PAPER CUTTER.

(Application filed Aug. '7, 1899.) (No Moual.) I 3 Sheets-Sheet 3.

lfla'iresses Inner/5a) RO erZ fls 'arauze Mrs STATES ATENT Fries.

ROBERT FRITH SPROULE, OF LONDON, ENGLAND.

PAPER-CUTTER.

SPECIFICATION forming part of Letters Patent No. 640,713, dated January 2, 19 00.

Application filed August 7,1899. SerielNo.'726,415. (No model.)

To all whom it may concern.-

Be it known that I, ROBERT FRITH SPROULE, a citizen of England, residing at 205 Uxbridge road, London, England, have invented a certain new and useful Improvement in Guillotine Paper-Gutters, (for which I have applied for a patent in Great Britain, dated March 13, 1899, No. 5,463,) of which the following is a specification.

My invention relates to guillotine paper-cutters in which a knife moves down obliquely, cutting a pile of paper which is held firmly down by a similarly-moving clamping-slide, the object of my invention being so to connect the knife to the clamp that the clamping is automatically effected by the movement of the knife just before the out begins and the clamping is retained until the cut is completed. For this purpose I construct and arrange the cutting and clamping slides as I shall describe, referring to the accompanying drawings.

Figure 1 is a front view, Fig. 2 is an end view, and Fig. 3 is a plan, of a guillotine-cutter according to my invention. The other figures, drawn to an enlarged scale, show details-that is to say, Fig. 4 is a section of the clamping-bar and checks. Fig. 5 is an elevation of the roller and part of the incline for acting on the grippinglever. Figs. 6 and 7 are front and side elevations of the gripping-fork; and Fig. 8 is a detail front elevation, omitting some parts to more clearly show the toggle, which is in a different position from that represented in Fig. 1.

In the drawings, ctindicates the fixed framing of the machine.

I) is the slide, which carries the knife and which is caused to reciprocate in the usual way by anyconvenient power applied at a, sliding in an inclined path, as determined by pins engaged in the inclined slots (1. Behind the knife-slide b is fitted the clamping-slide e, which is also guided by inclined slots corresponding with the slots cl. To the knifeslide 29 is jointed a clamping-bar f, which may be of H-section, as shown in Fig. 4, this bar being fitted to slide between a check 9, which has an adjustable wedge and is fixed on the clamping-slide e, and a check h, which has its one end pivoted at t' on the clampingslide and its other end pivoted to one limb j of a toggle-joint, the other limb of which is pivoted at'k to the clamping-slide. On the frame a is fixed a fork Z, which receives the middle pin of the toggle when the slide reaches the upper end of its stroke. On the clamping-slide is pivoted a roller m and at n one end of a lever-arm 0, the other end of which has mounted in a slot a roller 1). On the knife-slide b is fixed a bar q, having its end made with an incline r, as shown in Fig. 5.

In order to give support to the lever-arm 0, a rod 8 has its one end jointed to it and its other end jointed to a stud u, projecting from the clamp-slide. Behind the clamp-slide a rodt (indicated by dotted lines in Fig. 1) has its ends attached to the framing a, and about ,its middle it passes through the slot of a forked stud it, which passes through a hole of the clamping-slide 6, while its rounded part passes through a hole of the lever-arm o and is screwed to receive an adj usting-nut and locknut 11. Between the rod t and the clampingslide e is a piece 10, hollowed to receive the rod t. On the clamp-bar f is a stud w, in the path of which the upper limb of the toggle has a projecting part y.

The machine operates as follows: The toggle being in the position shown in Fig. 1, the barf is clamped between the cheeks g and h, and as the knife-slide b descends the clamp slide 6 descends with it until it reaches the pile of paper z and firmly presses on it. When it can descend no farther, the knife continues to descend, bringing the stud as against the projecting end y of the toggle, which is thus bent, as shown in Fig. 8, withdrawing the cheek 71, and so releasing the bar f, which freely moves, resting on the roller m while the knife continues to descend, but at the time when as meeting y releases the toggle the incline r, acting on the roller 19, moves the lever-arm 0 forward, so that the stud u, moving with it, presses the rodt and piece to forcibly against the back of the clamping-slide e, and this frictional pressure holds the clampslide 6 firmly in position, clamping the paper .2 while the knife continues to cut through the pile. The knife-slide after completing its stroke rises alone until projections 1 at its ends meet studs 2, projecting from the clampslide 6, and then both slides rise together until the middle pin of the toggle enters the fork Z, whereby the toggle is again straightened and the bar f is clamped ready for the next operation.

obliqu ely-movable paper-clampin g slide, and

an obliquely-movable knife-slide carrying a paper-cutting knife, of a toggle pivoted at one 'end to the paper-clamping slide, a cheek pivoted to the clamping-slide and to said toggle, a cheek fixed to said clamping-slide, a clamping-bar pivoted to the knife-slide and sliding between said pivoted and movable cheeks, and devices codperating therewith for automatically clamping the paper by the movement of the knife, substantially as described.

2. The combination of the obliquely-movable knifecarrying and paper-clamping slides 11 and e, the clamping-bar f pivoted to the knife-carrying slide and having a stud 03, the fixed and pivoted cheeks g and h on said clamping-slide, the toggle j, 70 pivoted to the clamping-slide and to the pivoted cheek, the

fork Z, the roller m the pivoted lever-arm o, the incline a", the stud u in the clamping-slide, the rod 6 passing through said stud, and the piece 11;, under said rod, substantially as described.

3. The combination with the paper-table, and the obliquely-movable paper-clamping and knife-carrying slides, of the toggle j k carried by the paper-clamping slide, and automatically-operated devices coasting with said toggle and serving to actuate the clamping-slide by the movement of the knife-slide, substantially as described.

4. The combination of the knife-slide with its clamping-bar, the clamping-slide with its cheeks and toggle, the stud for releasing the toggle and the fork for straightening it, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing Wit nesses.

7 ROBERT FRITH SPROULE.

Witnesses:

FRED C. HARRIS, GERALD L. SMITH. 

